return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C2H4S (Thiirane)

using model chemistry: MP2=FULL/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2=FULL/STO-3G
 hartrees
Energy at 0K-470.416919
Energy at 298.15K-470.421448
HF Energy-470.273913
Nuclear repulsion energy100.519721
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2=FULL/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3422 3042 0.02      
2 A1 1681 1494 3.79      
3 A1 1269 1128 1.72      
4 A1 1159 1030 0.10      
5 A1 821 730 3.80      
6 A2 3562 3166 0.00      
7 A2 1307 1162 0.00      
8 A2 996 885 0.00      
9 B1 3567 3171 3.43      
10 B1 1074 955 0.16      
11 B1 910 809 0.01      
12 B2 3415 3035 0.30      
13 B2 1662 1477 1.30      
14 B2 1223 1087 11.36      
15 B2 867 770 0.63      

Unscaled Zero Point Vibrational Energy (zpe) 13467.3 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 11971.1 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/STO-3G
ABC
0.70330 0.36383 0.26553

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.861
C2 0.000 0.764 -0.779
C3 0.000 -0.764 -0.779
H4 -0.919 1.274 -1.109
H5 0.919 1.274 -1.109
H6 0.919 -1.274 -1.109
H7 -0.919 -1.274 -1.109

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.80971.80972.51992.51992.51992.5199
C21.80971.52881.10161.10162.26002.2600
C31.80971.52882.26002.26001.10161.1016
H42.51991.10162.26001.83893.14162.5472
H52.51991.10162.26001.83892.54723.1416
H62.51992.26001.10163.14162.54721.8389
H72.51992.26001.10162.54723.14161.8389

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.016 S1 C2 H4 117.823
S1 C2 H5 117.823 S1 C3 C2 65.016
S1 C3 H6 117.823 S1 C3 H7 117.823
C2 S1 C3 49.969 C2 C3 H6 117.533
C2 C3 H7 117.533 C3 C2 H4 117.533
C3 C2 H5 117.533 H4 C2 H5 113.154
H6 C3 H7 113.154
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability